IFC R2.0 Final

Layered structure (material layers)

Version : 001 (18/06/00)

Definition

The IFC model has very limited support for describing material layers in a layered structure. It is possible to describe a structure with homogenous layers (layers that consist on one material). More complex structures are not supported by IFCs.

Currently the more appropriate way is to use the project type of e.g. a wall to get the layer information. In this system the information about the layers is not captured in the IFC model, only the type of the wall (e.g. WallType#1) is exchanged in the IFC file. Both the sending and receiving application have to have some agreement what that type means, but it can also mean quite different things to the different applications (e.g. level of detail)

View considerations

At the moment the concept of 'Layered structure (material layers)' is not very useful for any view.

Used by views

Arch. design >> Quantities take off

Arch. design >> Thermal load calculations / HVAC system design

CAD / visualization

Data structure

IfcMaterialLayerSetUsage
ForLayerSet
IfcMaterialLayerSet
HasMaterialLayers
IfcMaterialLayer
Material
IfcMaterial
MaterialName
OffsetFromMLSBase
LayerThickness
MlsOffsetFromBaseline
MlsSenseLtoR

Used by concepts
Floor slab
Roof slab
Wall